Wrench.



A; SHEDLOGK.

WRENCH.

APPLICATION FILED APR. 9, 1913.

1,1 17,710. Patented Nov. 17, 1914.

1&1; F 3.

a L m 2 x 1 i w I 12 g i L THE NORRIS PETERS Co PHoro-LITHQ, WASHINGION. D. c

"UNITED %TATE% @FFICE.

ALFRED SHEDLOCK, OF CANNON STATION, CONNECTICUT.

W'RENCH.

Application filed April 9, 1913.

1 b all whom it may concern Be it known that I, ALFRED SHEDLOCK, acitizen of the United States, residing at Cannon Station, county ofFairfield, State of Connecticut, have invented a new and useful lVrench,of which the following is a specification.

The wrench forming the subject of this invention is of that class inwhich one of the jaws is set in operative position relative to the otherjaw by means of a screw and coacting nut, and it comprises means forpositively forcibly closing the jaws on an article placed between themand positively releasing the j aws when a fresh grip on the article hasto be taken, and also means for preventing the loss of the setadjustment in handling the tool due to slackness of the screw or nut, orboth. The construction and arrangement of the operating handle, which isfitted to rock on one of the j aw-members, and of its co-acting parts,are such that large working bearings are provided and that the powerapplied to said rocking handle causes the necessary amount of grippingaction. of the jaws to insure a positive and secure hold on the articleplaced between them.

Practical embodiments of the invention are illustrated in theaccompanying drawings, in which:

Figure l is a side view of a wrench embodying the features of thisinvention with the front half of the operating handle removed; Fig. 2 isa transverse section, on line 2, 2, Fig. 1; Fig. 3 is a view similar toFig. 1, illustrating a modification; and Fig. 4 1s a transverse section,on line l, 4, Fig. 3.

The body portion a, of the wrench shown at Figs. 1 and 2, carries theinner jaw b, and is provided with sockets e, (Z, in which slides thestem 6 of the outer jaw f. This stem is screw-threaded and has anadjusting nut g. The operating handle it is forked at its upper part toembrace the two sides of the body, and is preferably longitudinallydivided into two parts which are secured together when in operativeposition, as by means of screws or rivets. The extreme upper ends 71,'5, of the two branches of the handle are rounded and fit into circularrecesses j, 7', formed in the sides of the body a, constitutingknee-joints, and to hold these parts together annular grooves k, is, areformed on the sides of the body a into which extend correspondingflanges Z on the ends i, 2', of the handle. Power is applied toSpecification of Letters Patent.

Serial No. 759,859.

bring the jaws b and f together to forcibly grip an article, as a pipeor nut, located between them, when the handle is rocked on itsknee-joints, to the part of the to or outer surface of the nut 9adjacent the body a by a bar in contact therewith extending between theopposite inner faces of the ends 1', 1', preferably composed of lugs m,m, formed on the ends 6, 2', thus affording a working bearing contactbetween m, m, and the nut g of considerable extent, as clearly shown atFig. 2.

To insure proper gripping action of the jaws, whether they be toothed togrip pipe or plain to grip nuts, it is found that the lever action ofthe handle must exert considerable force in bringing the jaws together,and this construction, with the bearing located within the circle of theknee joint bearing, tends to such end as the work resisting arm of thelever may be very short between the center of the knee-joints and theworking edge of bar m, m, relatively to the power applying arm, viz.,the length between center of knee-joint and the end of Patented Nov. 17,1914.

the handle. This construction also provides large and strong workingbearings.

A spring a may be interposed between the lower face of the nut g and thebody a to hold the upper face of the nut and the bar m, m, together, andconsequently pressing the rounded upper ends 13 of the handle at alltimes against the circular recess bearing j, thus holding all parts ofthe wrench together and avoiding the use of special means for thispurpose, such as the before mentioned annular grooves in and flanges Z.The spring also acts to prevent rattling of the parts, which is liableto cause the nut to turn on the stem and so disturb the adjustment ofthe jaws.

The operation of the modification, Figs. 3 I

and -.l. and the functions of the various parts are similar to thedevice described. The

screw-threaded stem 6 carries the inner jaw Z and the under side of thenut g is acted upon by the bar 0, 0, of the operating handle 71., whoseupper forked end is provided with circular bosses p, p, which fit intocorresponding recesses q, Q, formed in the sides of the body 7', whichcarries at its upper end the outer jaw f, and has sockets s and t inwhich the screw-threaded stem 6 slides. A flat washer spring o is placedbetween the top of the nut g and the socket s. This spring '0 holds theparts together and prevents rattling and consequent shifting of the nuton the screw, which occurs with loss of adjustment when, as is usual inthis class of wrenches, there is slackness in the working parts. The twoparts of the handle may, when in operative position, be secured togetherby rivets or screws 10. Instead of the working bars m, m of Figs. 1 and2 and 0, 0, of Figs. 3 and at working on the parts of the nuts adjacentthe edge of the stems, they may be extended to work on the nuts at theflat sides ofthe stein, as indicated by the dotted lines 41;, a", Fig.3, when it is thought advisable to increase the amount of movement ofthe sliding jaw relative to the arc of rocking of the handle on the bodyof the wrench.

I claim:

1; A wrench. comprising two aw members, one provided with sockets andthe other one'having a screw-threaded stem fitted to slide in thesockets, an adjusting nut on the stem, anoperating lever handleconnected to rock on the socket provided member and a bearing barcarried by the handle, located within the circle of the bearing surfaceof the. handle and between the adjacent edges of the screw-threaded stemand the socket provided member, and adapted to act on one of the facesof the nut to move the jaws to ward one another.

2. A Wrench comprising two members, one provided with sockets and theother one having a screw-threaded stem fitted to slide in the sockets,an adjusting nut on the stem, an operating lever handle connected torock on the socket provided member and a bearing bar. carried by thehandle, located within the circle of the bearing surface of the handleand between the adjacent edges of .the screw-threaded stem and thesocket provided member, and adapted to act on one offthe faces of thenut to move the jaws toward one another, and a spring arranged toact onthe other side of the nut and operating to separate the j aws 3: Awrench comprising a jaw provided- Wlth ascrew-threaded stem, a nut onthe stem and body portion and adaptedto act on one side of the nut.

4. A wrench comprising a jaw provided with a screw threaded stem, a nuton the stem, a body portion provided with the other jaw and sockets inwhich the screw-threaded stem slides and having circular recesses formedin its sides, an operating handle having its end formed to fit in thecircular recesses of the body portion, thus constituting ingknee-joints, and a bearing bar on the handle located between theadjacent edges of the stem and body portion and adapted to act on oneside of the nut, and a spring adapted to act on the other side of thenut.

5. A wrench comprising two members slidably connected, means carried byone of the members for spacing the jaws of the members relative to oneanother, an operating handle having a lateral opening embracing the bodyportion of the other member and having its end rounded, open sidedcircular hearings on the sides of the last mentioned member into whichthe rounded end of the handle seats, a bearing extending across thelateral opening of the handle adapted to act on one side of thejawspacing means, and a spring arranged to act on the other side of the jawspacing means to hold the parts of the wrench operatively together andto separate the jaws when the handle is moved backwardly.

6. A wrench comprising two jaw members, one provided with ascrew-threaded stem and the other one "provided with sockets in whichthe stem is fitted to slide, a nut on the-stem, an operating handlehaving a lateral opening .embracingthe inner part of across the lateralopening of-the handle.

adapted to act on the outer. side'of the nut,

and a spring arranged between the inner side of the nut and the innersocket of the 1nner jaw member ,so as to hold the parts of the wrenchoperatively together and to separate the. jaws when the handle is. movedbackwardly.

In testimony whereof I havehereunto set my hand this 8th day of April,1913. p

i ALFRED SHEDLOCK. In the presence of-- ARTHUR G. BLATZ, WM. J. DOLAN.

copies of. this patent may bev obtained for five cents each, byaddressing, the 5 Commissioner of Patents.

. Waahingt on, 31.0.

